* add trau_mux implementation to relay from one incoming TRAU
channel to another one (simple voice call switching)
* add a way more generic E1 input layer, abstracting out the misdn
low-level interface. This also adds infrastructure for multiple TRX
in one BTS, as well as multiple BTS on one E1 link
* add a E1 subchannel multiplexer for sending multiple 16kbit sub-channels
one one 64kBps E1 channel
* add TRAU IDLE frame generation
* terminate bsc_hack in case there is a E1 / mISDN init error
* introduce 'e1_config.c' file with static configuration of our
E1 setup (which TRX/BTS is configured for which TEI/SAPI/E1). This should
later become a config file rather than a compiled C file.
WARNING: all this compiles but is not tested yet. Expect fix-up committs over
the next hours or so
diff --git a/src/e1_config.c b/src/e1_config.c
new file mode 100644
index 0000000..cf3a94b
--- /dev/null
+++ b/src/e1_config.c
@@ -0,0 +1,57 @@
+#include <string.h>
+#include <errno.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/e1_input.h>
+
+#define SAPI_L2ML 0
+#define SAPI_OML 62
+#define SAPI_RSL 0 /* 63 ? */
+
+#define TEI_L2ML 127
+#define TEI_OML 25
+#define TEI_RSL 1
+
+/* do some compiled-in configuration for our BTS/E1 setup */
+int e1_config(struct gsm_bts *bts)
+{
+ struct e1inp_line *line;
+ struct e1inp_ts *sign_ts;
+ struct e1inp_sign_link *oml_link, *rsl_link;
+
+ line = malloc(sizeof(*line));
+ if (!line)
+ return -ENOMEM;
+ memset(line, 0, sizeof(*line));
+
+ /* create E1 timeslots for signalling and TRAU frames */
+ e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN);
+ e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_TRAU);
+ e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU);
+
+ /* create signalling links for TS1 */
+ sign_ts = &line->ts[1-1];
+ oml_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_OML,
+ bts->c0, TEI_OML, SAPI_OML);
+ rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
+ bts->c0, TEI_RSL, SAPI_RSL);
+
+ /* create back-links from bts/trx */
+ bts->oml_link = oml_link;
+ bts->c0->rsl_link = rsl_link;
+
+#if 0
+ /* create E1 timeslots for signalling and TRAU frames */
+ e1inp_ts_config(&line->ts[4-1], line, E1INP_TS_TYPE_TRAU);
+ e1inp_ts_config(&line->ts[5-1], line, E1INP_TS_TYPE_TRAU);
+
+ /* create signalling links for TS1 */
+ sign_ts = &line->ts[1-1];
+ rsl_link = e1inp_sign_link_create(sign_ts, E1INP_SIGN_RSL,
+ &bts->trx[1], TEI_RSL+1, SAPI_RSL);
+ /* create back-links from trx */
+ bts->trx[1].rsl_link = rsl_link;
+#endif
+
+ return mi_setup(0, line, NULL);
+}